Create and use shared stub for for DictionaryValue-based elements.

src/ic.h

Index: src/ic.h
diff --git a/src/ic.h b/src/ic.h
index 9a663ba6aac1e9158efe019a8a950851e4bc0c30..240c8f534e832842c1fd540884d720a1d03d445f 100644
--- a/src/ic.h
+++ b/src/ic.h
@@ -345,10 +345,8 @@ class KeyedIC: public IC {
   explicit KeyedIC(Isolate* isolate) : IC(NO_EXTRA_FRAME, isolate) {}
   virtual ~KeyedIC() {}
 
-  virtual MaybeObject* GetFastElementStubWithoutMapCheck(
-      bool is_js_array) = 0;
-
-  virtual MaybeObject* GetExternalArrayStubWithoutMapCheck(
+  virtual MaybeObject* GetElementStubWithoutMapCheck(
+      bool is_js_array,
       JSObject::ElementsKind elements_kind) = 0;
 
  protected:
@@ -415,10 +413,8 @@ class KeyedLoadIC: public KeyedIC {
   static const int kSlowCaseBitFieldMask =
       (1 << Map::kIsAccessCheckNeeded) | (1 << Map::kHasIndexedInterceptor);
 
-  virtual MaybeObject* GetFastElementStubWithoutMapCheck(
-      bool is_js_array);
-
-  virtual MaybeObject* GetExternalArrayStubWithoutMapCheck(
+  virtual MaybeObject* GetElementStubWithoutMapCheck(
+      bool is_js_array,
       JSObject::ElementsKind elements_kind);
 
  protected:
@@ -568,10 +564,8 @@ class KeyedStoreIC: public KeyedIC {
   static void GenerateGeneric(MacroAssembler* masm, StrictModeFlag strict_mode);
   static void GenerateNonStrictArguments(MacroAssembler* masm);
 
-  virtual MaybeObject* GetFastElementStubWithoutMapCheck(
-      bool is_js_array);
-
-  virtual MaybeObject* GetExternalArrayStubWithoutMapCheck(
+  virtual MaybeObject* GetElementStubWithoutMapCheck(
+      bool is_js_array,
       JSObject::ElementsKind elements_kind);
 
  protected: